Electrostriction, Piezoelectricity and Elasticity in Ferroelectric SbSI
Electrostriction, Piezoelectricity and Elasticity in Ferroelectric SbSI
复制标题
铁电 SbSI 中的电致伸缩、压电和弹性
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
T. Shinmi
中科院分区：
文献类型：
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作者：
K. Hamano;T. Shinmi
用共振法测定了-70 ° C ~ 50°C范围内的电致伸缩系数Q33和弹性柔度系数s33 D、s33 E。在铁电相，Q33是由压电系数和自发极化得到的，而在顺电相，它是由场致压电得到的。为了避免空间电荷极化引起的误差，采用了一个交流偏压.在整个帕拉相和铁电相中，Q33（1.8×10 - 12 CGSesu）几乎与温度无关.此外，它同意从自发应变估计的值。这些事实表明，在所研究的温度范围内，应变与极化的平方成正比。而s33 E在Tc以下有明显的异常，s33 D（3.0×10 - 12 cm 2 /dyn）几乎与温度无关。从热力学角度讨论了相变点的应力依赖性。
By the use of the resonance method, the electrostrictive coefficient Q 33 and the elastic compliance coefficients s 33 D , s 33 E have been determined from -70°C to 50°C. In the ferroelectric phase, Q 33 was obtained from the piezoelectric coefficient and spontaneous polarization, while in the paraelectric phase it was obtained from the field-induced piezoelectricity. An a c bias was used to avoid the errors arising from a space charge polarization. The coefficient Q 33 (1.8×10 -12 CGSesu) was found to be nearly temperature independent throughout the para- and ferroelectric phases. Further it agreed with the value estimated from the spontaneous strain. These facts indicate that the strain is proportional to the square of polarization over the temperature range investigated. While s 33 E , exhibits a pronounced anomaly below T c , s 33 D (3.0×10 -12 cm 2 /dyn) is almost temperature independent. Thermodynamic discussion is made of stress dependence of the transition point.